From 8492fb1ed7476a8a3b9adcbbf8a4a32df4410cb8 2017-06-23 14:26:15
From: Alexandre Leroux <aleroux@itlink.fr>
Date: 2017-06-23 14:26:15
Subject: [PATCH] QCustomPlot notify the graph widget when the xRange changed

---

diff --git a/gui/include/Visualization/VisualizationGraphWidget.h b/gui/include/Visualization/VisualizationGraphWidget.h
index 33998b0..710eba6 100644
--- a/gui/include/Visualization/VisualizationGraphWidget.h
+++ b/gui/include/Visualization/VisualizationGraphWidget.h
@@ -12,6 +12,7 @@
 
 Q_DECLARE_LOGGING_CATEGORY(LOG_VisualizationGraphWidget)
 
+class QCPRange;
 class Variable;
 
 namespace Ui {
@@ -40,6 +41,9 @@ private:
     spimpl::unique_impl_ptr<VisualizationGraphWidgetPrivate> impl;
 
 private slots:
+
+    void onRangeChanged(const QCPRange &t1, const QCPRange &t2);
+
     /// Slot called when a mouse wheel was made, to perform some processing before the zoom is done
     void onMouseWheel(QWheelEvent *event) noexcept;
 };
diff --git a/gui/src/Visualization/VisualizationGraphWidget.cpp b/gui/src/Visualization/VisualizationGraphWidget.cpp
index ee02cb7..897dc7c 100644
--- a/gui/src/Visualization/VisualizationGraphWidget.cpp
+++ b/gui/src/Visualization/VisualizationGraphWidget.cpp
@@ -4,7 +4,6 @@
 #include "ui_VisualizationGraphWidget.h"
 
 #include <Variable/Variable.h>
-
 #include <unordered_map>
 
 Q_LOGGING_CATEGORY(LOG_VisualizationGraphWidget, "VisualizationGraphWidget")
@@ -42,8 +41,12 @@ VisualizationGraphWidget::VisualizationGraphWidget(const QString &name, QWidget 
     ui->widget->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
     ui->widget->axisRect()->setRangeDrag(Qt::Horizontal);
     connect(ui->widget, &QCustomPlot::mouseWheel, this, &VisualizationGraphWidget::onMouseWheel);
+    connect(ui->widget->xAxis, static_cast<void (QCPAxis::*)(const QCPRange &, const QCPRange &)>(
+                                   &QCPAxis::rangeChanged),
+            this, &VisualizationGraphWidget::onRangeChanged);
 }
 
+
 VisualizationGraphWidget::~VisualizationGraphWidget()
 {
     delete ui;
@@ -93,6 +96,14 @@ QString VisualizationGraphWidget::name() const
     }
 }
 
+void VisualizationGraphWidget::onRangeChanged(const QCPRange &t1, const QCPRange &t2)
+{
+    for (auto it = impl->m_VariableToPlotMap.cbegin(); it != impl->m_VariableToPlotMap.cend();
+         ++it) {
+        it->first->onXRangeChanged(SqpDateTime{t2.lower, t2.upper});
+    }
+}
+
 void VisualizationGraphWidget::onMouseWheel(QWheelEvent *event) noexcept
 {
     auto zoomOrientations = QFlags<Qt::Orientation>{};